223 lines
6.4 KiB
TypeScript
223 lines
6.4 KiB
TypeScript
import clsx from 'clsx'
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import { useState, useEffect } from 'react'
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import { Bet } from '../../common/bet'
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import {
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getOutcomeProbabilityAfterBet,
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calculateShares,
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calculatePayoutAfterCorrectBet,
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} from '../../common/calculate'
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import { NumericContract } from '../../common/contract'
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import {
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formatPercent,
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formatWithCommas,
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formatMoney,
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} from '../../common/util/format'
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import { useFocus } from '../hooks/use-focus'
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import { useUser } from '../hooks/use-user'
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import { placeBet } from '../lib/firebase/api-call'
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import { firebaseLogin, User } from '../lib/firebase/users'
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import { BucketAmountInput, BuyAmountInput } from './amount-input'
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import { InfoTooltip } from './info-tooltip'
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import { Col } from './layout/col'
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import { Row } from './layout/row'
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import { Spacer } from './layout/spacer'
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export function NumericBetPanel(props: {
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contract: NumericContract
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className?: string
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}) {
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const { contract, className } = props
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const user = useUser()
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return (
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<Col className={clsx('rounded-md bg-white px-8 py-6', className)}>
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<div className="mb-6 text-2xl">Place your bet</div>
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<NumericBuyPanel contract={contract} user={user} />
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{user === null && (
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<button
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className="btn flex-1 whitespace-nowrap border-none bg-gradient-to-r from-teal-500 to-green-500 px-10 text-lg font-medium normal-case hover:from-teal-600 hover:to-green-600"
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onClick={firebaseLogin}
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>
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Sign up to trade!
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</button>
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)}
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</Col>
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)
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}
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function NumericBuyPanel(props: {
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contract: NumericContract
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user: User | null | undefined
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onBuySuccess?: () => void
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}) {
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const { contract, user, onBuySuccess } = props
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const { bucketCount, min, max } = contract
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const [bucketChoice, setBucketChoice] = useState<string | undefined>(
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undefined
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)
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const [betAmount, setBetAmount] = useState<number | undefined>(undefined)
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const [error, setError] = useState<string | undefined>()
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const [isSubmitting, setIsSubmitting] = useState(false)
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const [wasSubmitted, setWasSubmitted] = useState(false)
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const [inputRef, focusAmountInput] = useFocus()
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useEffect(() => {
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focusAmountInput()
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}, [focusAmountInput])
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function onBetChange(newAmount: number | undefined) {
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setWasSubmitted(false)
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setBetAmount(newAmount)
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}
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async function submitBet() {
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if (!user || !betAmount) return
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setError(undefined)
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setIsSubmitting(true)
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const result = await placeBet({
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amount: betAmount,
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outcome: bucketChoice,
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contractId: contract.id,
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}).then((r) => r.data as any)
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console.log('placed bet. Result:', result)
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if (result?.status === 'success') {
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setIsSubmitting(false)
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setWasSubmitted(true)
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setBetAmount(undefined)
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if (onBuySuccess) onBuySuccess()
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} else {
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setError(result?.message || 'Error placing bet')
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setIsSubmitting(false)
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}
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}
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const betDisabled = isSubmitting || !betAmount || error
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const initialProb = 0
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const outcomeProb = getOutcomeProbabilityAfterBet(
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contract,
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bucketChoice || 'YES',
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betAmount ?? 0
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)
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const resultProb = bucketChoice === 'NO' ? 1 - outcomeProb : outcomeProb
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const shares = calculateShares(
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contract,
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betAmount ?? 0,
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bucketChoice || 'YES'
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)
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const currentPayout = betAmount
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? calculatePayoutAfterCorrectBet(contract, {
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outcome: bucketChoice,
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amount: betAmount,
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shares,
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} as Bet)
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: 0
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const currentReturn = betAmount ? (currentPayout - betAmount) / betAmount : 0
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const currentReturnPercent = formatPercent(currentReturn)
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const dpmTooltip =
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contract.mechanism === 'dpm-2'
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? `Current payout for ${formatWithCommas(shares)} / ${formatWithCommas(
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shares +
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contract.totalShares[bucketChoice ?? 'YES'] -
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(contract.phantomShares
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? contract.phantomShares[bucketChoice ?? 'YES']
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: 0)
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)} ${bucketChoice ?? 'YES'} shares`
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: undefined
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return (
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<>
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<div className="my-3 text-left text-sm text-gray-500">Numeric value</div>
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<BucketAmountInput
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bucket={bucketChoice ? +bucketChoice : undefined}
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bucketCount={bucketCount}
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min={min}
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max={max}
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inputClassName="w-full max-w-none"
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onChange={(bucket) => setBucketChoice(bucket ? `${bucket}` : undefined)}
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error={error}
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setError={setError}
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disabled={isSubmitting}
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inputRef={inputRef}
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/>
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<div className="my-3 text-left text-sm text-gray-500">Amount</div>
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<BuyAmountInput
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inputClassName="w-full max-w-none"
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amount={betAmount}
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onChange={onBetChange}
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error={error}
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setError={setError}
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disabled={isSubmitting}
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inputRef={inputRef}
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/>
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<Col className="mt-3 w-full gap-3">
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<Row className="items-center justify-between text-sm">
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<div className="text-gray-500">Probability</div>
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<Row>
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<div>{formatPercent(initialProb)}</div>
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<div className="mx-2">→</div>
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<div>{formatPercent(resultProb)}</div>
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</Row>
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</Row>
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<Row className="items-center justify-between gap-2 text-sm">
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<Row className="flex-nowrap items-center gap-2 whitespace-nowrap text-gray-500">
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<div>
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{contract.mechanism === 'dpm-2' ? (
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<>
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Estimated
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<br /> payout if correct
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</>
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) : (
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<>Payout if correct</>
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)}
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</div>
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{dpmTooltip && <InfoTooltip text={dpmTooltip} />}
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</Row>
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<Row className="flex-wrap items-end justify-end gap-2">
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<span className="whitespace-nowrap">
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{formatMoney(currentPayout)}
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</span>
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<span>(+{currentReturnPercent})</span>
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</Row>
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</Row>
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</Col>
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<Spacer h={8} />
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{user && (
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<button
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className={clsx(
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'btn flex-1',
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betDisabled
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? 'btn-disabled'
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: bucketChoice === 'YES'
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? 'btn-primary'
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: 'border-none bg-red-400 hover:bg-red-500',
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isSubmitting ? 'loading' : ''
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)}
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onClick={betDisabled ? undefined : submitBet}
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>
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{isSubmitting ? 'Submitting...' : 'Submit bet'}
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</button>
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)}
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{wasSubmitted && <div className="mt-4">Bet submitted!</div>}
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</>
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)
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}
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